Preparation and characterisation of liquid epoxidised natural rubber in latex stage by chemical degradation
作者： Nurul Hayati Yusof , Krishna Veni Baratha Nesan , Dazylah Darji , Fatimah Rubaizah Mohd Rasdi
DOI: 10.1007/S42464-020-00076-2
关键词: Chemistry 、 Chemical decomposition 、 Glass transition 、 Pulmonary surfactant 、 Differential scanning calorimetry 、 Fourier transform infrared spectroscopy 、 Gel permeation chromatography 、 Natural rubber 、 Epoxy 、 Chemical engineering
摘要: Preparation and characterisation of liquid epoxidised natural rubber in latex by chemical degradation was successfully carried out. The effect certain parameters, such as surfactant concentrations, incubation time ENR the presence pH condition on reaction efficiency were studied. Effect degrading agent concentrations drying temperatures LENR also investigated. molecular weight, i.e., Mw Mn, which determined gel permeation chromatography (GPC) content decreased gradually increased. Moreover, temperatures, ranging from 333 to 423 K showed no significant changes epoxidation levels epoxy derivatives, period 24 4 h. resulting further characterised using Fourier transform infra-red (FTIR) spectroscope, nuclear magnetic resonance (NMR) differential scanning calorimeter (DSC) field emission-scanning electron microscope (FE-SEM). glass transition temperature, Tg LENR, 252 K increased compared with ENR, 248 K. Besides, particles morphology found be more uniform larger ENR. functional groups carbonyl end group, hydroxyl, epoxy, ester furan after form LENR. This indicates that polar at backbone play an important role brings about distinguished characters properties
springer.com
sci-hub.st 参考文章(34)
Krishna V. Baratha, Arnaud Nourry, Jean-François Pilard, Synthesis of NR based Polyurethanes containing phosphorylated polymers as chain extenders European Polymer Journal. ,vol. 70, pp. 317- 330 ,(2015) , 10.1016/J.EURPOLYMJ.2015.07.030
P. Phinyocheep, C. W. Phetphaisit, D. Derouet, I. Campistron, J. C. Brosse, Chemical degradation of epoxidized natural rubber using periodic acid: Preparation of epoxidized liquid natural rubber Journal of Applied Polymer Science. ,vol. 95, pp. 6- 15 ,(2005) , 10.1002/APP.20812
Warunee Klinklai, Seiichi Kawahara, Tomonobu Mizumo, Masahiro Yoshizawa, Jitladda Tangpakdee Sakdapipanich, Yoshinobu Isono, Hiroyuki Ohno, Depolymerization and ionic conductivity of enzymatically deproteinized natural rubber having epoxy group European Polymer Journal. ,vol. 39, pp. 1707- 1712 ,(2003) , 10.1016/S0014-3057(03)00060-0
Yongyue LUO, Changjin YANG, Bangqian CHEN, Kui XU, Jieping ZHONG, Zheng PENG, Zhen LÜ, Qinghuang WANG, Thermal degradation of epoxidized natural rubber in presence of neodymium stearate Journal of Rare Earths. ,vol. 31, pp. 526- 530 ,(2013) , 10.1016/S1002-0721(12)60314-7
John E. Davey, M. John R. Loadman, A chemical demonstration of the randomness of epoxidation of natural rubber British Polymer Journal. ,vol. 16, pp. 134- 138 ,(1984) , 10.1002/PI.4980160305
Jing Zhang, Qian Zhou, Xian-Hong Jiang, An-Ke Du, Tao Zhao, Johannes van Kasteren, Yu-Zhong Wang, Oxidation of natural rubber using a sodium tungstate/acetic acid/hydrogen peroxide catalytic system Polymer Degradation and Stability. ,vol. 95, pp. 1077- 1082 ,(2010) , 10.1016/J.POLYMDEGRADSTAB.2010.02.028
D. Derouet, N. Radhakrishnan, J.-C. Brosse, G. Boccaccio, Phosphorus modification of epoxidized liquid natural rubber to improve flame resistance of vulcanized rubbers Journal of Applied Polymer Science. ,vol. 52, pp. 1309- 1316 ,(1994) , 10.1002/APP.1994.070520915
Seng-Neon Gan, Ziana Abdul Hamid, Partial conversion of epoxide groups to diols in epoxidized natural rubber Polymer. ,vol. 38, pp. 1953- 1956 ,(1997) , 10.1016/S0032-3861(96)00710-0
Frederic Bonfils, Christine Char, Eugene E. Ehabe, Intrinsic Viscosity Characterization of Poly(cis-isoprene) in Hevea Natural Rubber International Journal of Polymeric Materials. ,vol. 57, pp. 1036- 1044 ,(2008) , 10.1080/00914030802257362
Vladimir L Lobachev, Elisei S Rudakov, The chemistry of peroxynitrite. Reaction mechanisms and kinetics Russian Chemical Reviews. ,vol. 75, pp. 375- 396 ,(2006) , 10.1070/RC2006V075N05ABEH001212